The Columbia River Gorge National Scenic Area is closing Herman Creek Campground and Horse Camp east of Cascade Locks to protect public health and safety, probably through the summer. Forest Service officials say 30 trees were identified with laminated root rot in the seven-site campground that is popular with equestrian users. The disease can cause healthy-looking trees to fall without warning. The Forest Service will be removing the diseased trees and replacing them with conifers resistant to laminated root rot. The Herman Creek Trailhead will not be affected by this closure.